CN104993119A - Lithium ion battery lithium titanate negative electrode sizing agent and preparation method thereof - Google Patents
Lithium ion battery lithium titanate negative electrode sizing agent and preparation method thereof Download PDFInfo
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- CN104993119A CN104993119A CN201510337679.8A CN201510337679A CN104993119A CN 104993119 A CN104993119 A CN 104993119A CN 201510337679 A CN201510337679 A CN 201510337679A CN 104993119 A CN104993119 A CN 104993119A
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- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 50
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 46
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 39
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 title claims abstract description 38
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 36
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 238000004513 sizing Methods 0.000 title abstract 3
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 24
- 239000004917 carbon fiber Substances 0.000 claims abstract description 24
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 24
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000006258 conductive agent Substances 0.000 claims abstract description 13
- 239000002270 dispersing agent Substances 0.000 claims abstract description 13
- 239000002904 solvent Substances 0.000 claims abstract description 12
- 239000002562 thickening agent Substances 0.000 claims abstract description 12
- 239000011230 binding agent Substances 0.000 claims abstract description 6
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 32
- 239000007787 solid Substances 0.000 claims description 29
- 238000000498 ball milling Methods 0.000 claims description 24
- 239000011521 glass Substances 0.000 claims description 20
- 239000002002 slurry Substances 0.000 claims description 19
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical group OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 18
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 14
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical group [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 claims description 12
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 12
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 claims description 12
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 claims description 12
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical group C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 claims description 7
- 239000008367 deionised water Substances 0.000 claims description 7
- 229910021641 deionized water Inorganic materials 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical group O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 239000006245 Carbon black Super-P Substances 0.000 claims description 6
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 239000006185 dispersion Substances 0.000 claims description 5
- 238000007613 slurry method Methods 0.000 claims description 4
- 238000010276 construction Methods 0.000 claims description 2
- 229910002804 graphite Inorganic materials 0.000 claims description 2
- 239000010439 graphite Substances 0.000 claims description 2
- 239000003273 ketjen black Substances 0.000 claims description 2
- 239000002356 single layer Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 5
- 239000007773 negative electrode material Substances 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 230000003014 reinforcing effect Effects 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 13
- 229910052799 carbon Inorganic materials 0.000 description 12
- 238000000034 method Methods 0.000 description 10
- 239000003792 electrolyte Substances 0.000 description 5
- 238000009831 deintercalation Methods 0.000 description 4
- 230000002441 reversible effect Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000002427 irreversible effect Effects 0.000 description 3
- -1 lithium titanate class Chemical class 0.000 description 3
- 241000446313 Lamella Species 0.000 description 2
- 239000007772 electrode material Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007784 solid electrolyte Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000005275 alloying Methods 0.000 description 1
- 239000010406 cathode material Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 229910021385 hard carbon Inorganic materials 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000002687 intercalation Effects 0.000 description 1
- 238000009830 intercalation Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 229910021384 soft carbon Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/485—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/624—Electric conductive fillers
- H01M4/625—Carbon or graphite
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/624—Electric conductive fillers
- H01M4/626—Metals
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Inorganic Chemistry (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Secondary Cells (AREA)
Abstract
The invention provides a lithium ion battery lithium titanate negative electrode sizing agent and a preparation method thereof. The lithium ion battery lithium titanate negative electrode sizing agent comprises lithium titanate, conductive agent, binder, thickener, solvent and dispersing agent, and is characterized by further comprising nanometer tin powder and carbon fiber. The nanometer tin powder and the carbon fiber are added to the negative electrode of a lithium ion battery in proportion and twined with all components such as the lithium titanate and the nanometer tin powder conductive agent through the characteristics that the carbon fiber is high in strength, excellent in conductivity and good in thermal conductivity and has a filamentary structure, and then the effects on reinforcing the negative electrode material and increasing the conductivity are achieved. Thus, the battery capacity is improved, and the cycle life of the battery is prolonged.
Description
Technical field
This patent relates to a kind of lithium titanate cathode of lithium ion battery slurry and preparation method thereof, and being specially with lithium titanate is negative material, and adds nanometer glass putty and the application of carbon fibre material in lithium ion battery negative.
Background technology
Since the beginning of the nineties in last century, Sony energy technology company took the lead in successfully developing the lithium ion battery using Carbon anode, lithium ion battery captures rapidly civil secondary Battery Market with the speed of average annual 15%, has become the first-selected power supply of current portable electronic equipment.The develop rapidly of lithium ion battery mainly has benefited from the contribution of electrode material, the particularly progress of negative material.What current commercial Li-ion battery negative material adopted is lithium titanate class material with carbon element, and having lower lithium embedding/deintercalation current potential, suitable reversible capacity and aboundresources, the advantage such as cheap, is more satisfactory lithium ion battery negative material.
Inexpensive with it, the nontoxic and superior chemical property of material with carbon element is widely used in lithium ion battery, and state of interface and the fine structure of itself have a great impact electrode performance.At present, commercial carbon negative electrode material of lithium ion cell can be divided into lithium titanate, hard carbon and soft carbon three class, and wherein lithium titanate class material is still the main flow of lithium ion battery negative material.Lithium titanate class material with carbon element, having lower lithium embedding/deintercalation current potential, suitable reversible capacity and aboundresources, the advantage such as cheap, is more satisfactory lithium ion battery negative material.But its theoretical specific capacity only has 372mAh/g, thus limit the further raising of lithium ion battery specific energy, the demand of growing high-energy Portable power source can not be met.Meanwhile, when lithium titanate is as negative material, in first charge-discharge process, form one deck solid electrolyte film (SEI) on its surface.Solid electrolyte film is the formation that react to each other such as electrolyte, negative material and lithium ion, irreversibly consumes lithium ion, is to form the main factor of of irreversible capacity; It two is in the process of Lithium-ion embeding, electrolyte easily and its be embedded in the process of moving out altogether, electrolyte is reduced, the gaseous product generated causes lithium titanate lamella to peel off, especially containing in the electrolyte of PC, lithium titanate lamella comes off new for formation interface, causes further SEI to be formed, irreversible capacity increases, and cyclical stability declines simultaneously.As lithium ion battery negative material, material with carbon element still exists that charge/discharge capacity is low, first cycle irreversible loss is large, solvent molecule intercalation and the shortcoming such as preparation cost is high altogether, and these are also the key issues solved needed in current Study on Li-ion batteries.
Li
4ti
5o
12as a kind of novel ion secondary battery cathode material lithium, compared with other business-like material, advantages such as having good cycle, do not react with electrolyte, security performance is high, charge and discharge platform is steady is one of the most excellent lithium ion battery negative material received much concern in recent years.Compared with carbon negative electrode material, lithium titanate has a lot of advantages, wherein, the deintercalation of lithium ion in lithium titanate is reversible, and lithium ion is embedding or is deviating from the process of lithium titanate, its crystal formation does not change, change in volume is less than 1%, therefore be called as " zero strain material ", can avoid causing structural damage due to the flexible back and forth of electrode material in charge and discharge cycles, thus improve cycle performance and the useful life of electrode, decrease and increase with cycle-index and bring specific capacity significantly to decay, there is the cycle performance more excellent than Carbon anode; But because lithium titanate is a kind of insulating material, its conductivity is low, thus cause the application in lithium electricity to there is the poor problem of high rate performance, lithium titanate material theoretical specific capacity is 175 mAh/g simultaneously, and actual specific capacity is greater than 160mAh/g, has the shortcomings such as gram volume is lower.
Metallic tin has the advantages such as high lithium storage content (994 mAh/g) and low lithium ion deintercalation platform voltage, is the extremely potential non-carbon negative material of one.People have carried out this kind of material and have studied widely in recent years, and make some progress.But in reversible lithium storage process, metallic tin volumetric expansion is remarkable, and cause cycle performance to be deteriorated, capacity is decayed rapidly, is therefore difficult to the requirement meeting large-scale production.For this reason, by introducing the nonmetalloids such as carbon, carrying out stable metal tin in the mode of alloying or compound, slowing down the volumetric expansion of tin.Carbon can stop the direct contact between tin particles, suppresses the reunion of tin particles and grows up, playing the effect of resilient coating.
Tin exceeds general 0.2V as its platform electromotive force of negative material than lithium metal, negative pole not easily occurs analysing lithium phenomenon in battery charging process.Carbon fiber has the features such as intensity is high, excellent conductivity, thermal conductivity are good simultaneously, because it has fine long filamentary structure, add in negative pole with nanometer glass putty simultaneously, mutually can be wound around with each components such as lithium titanate, nanometer glass putty conductive agents, the effect play and reinforce negative material, increasing conductivity, both coordinated, improve capacity and the cycle performance of battery.
Summary of the invention
The object of this patent is to provide a kind of lithium titanate cathode of lithium ion battery slurry and preparation method thereof, to improve battery capacity, to improve battery cycle life.
For achieving the above object, the technical scheme that this patent adopts is: a kind of lithium titanate cathode of lithium ion battery slurry, comprise lithium titanate, conductive agent, binding agent, thickener, solvent and dispersant, it is characterized in that, also comprise nanometer glass putty and carbon fiber, conductive agent accounts for the 0%-3% of total solid weight, dispersant addition accounts for the 2%-10% of total solid mass fraction, nanometer glass putty accounts for the 2%-20% of total solid, carbon fiber accounts for the 20-80% of nanometer tin grain weight amount, described nanometer glass putty median particle diameter D50 scope is between 10-100nm, in described carbon fiber, straight particle diameter footpath D50 is between 10-200nm.
Described carbon fiber is hollow or solid construction.
The hollow structure of described carbon fiber is single layer hollow or multilayer hollow.
Described nanometer tin powder footpath is between 30-100nm.
Conductive agent is the one in Super-P, graphite agent, Ketjen black.
Described solvent is deionized water, binding agent is butadiene-styrene rubber, and thickener is sodium carboxymethylcellulose.
Described dispersant is ethylene glycol or glycerol.
A kind of preparation process of lithium titanate cathode of lithium ion battery slurry is as follows:
(1) take deionized water as solvent, thickener sodium carboxymethylcellulose mixer is uniformly dissolved; Pour in ball mill by the sodium carboxymethylcellulose after dissolving, add conductive agent, ball milling disperses 1 hour; Add lithium titanate, ball milling disperses 2 hours;
(2) add dispersant ethylene glycol, after ball milling disperses 10 minutes, nanometer glass putty and carbon fiber are added in mixing material and continue dispersion 1 hour;
(3) add butadiene-styrene rubber, ball milling disperses 1 hour, regulates slurry viscosity to 2000-3000mPas, discharging.
Nanometer glass putty has the feature of high power capacity, but along with very large change in volume in battery charge and discharge process, easily causes negative pole material to come off from collector, affect cycle life.This patent uses ball milling method batching, and with the use of dispersant, nanometer glass putty and carbon fiber are added among lithium ion battery negative in proportion, intensity is high, excellent conductivity, thermal conductivity are good to utilize carbon fiber to have, and its filamentary structure feature had, itself and each component such as lithium titanate, nanometer glass putty conductive agent are wound around mutually, the effect play and reinforce negative material, increasing conductivity.Thus improve battery capacity, improve battery cycle life.
Embodiment
For column type 18650 lithium ion battery, the ratio provided in this patent when cathode blending and distribution add nanometer glass putty and carbon fiber, comparative illustration its capacity of lithium ion battery and cycle performance are improved.In battery design, calculate positive/negative plate length by box hat filling rate 95%, embodiment and comparative example are that cathode blending mode and proportioning are illustrated.
Embodiment 1
Take deionized water as solvent, by account for mass fraction of solids be 1.5% thickener sodium carboxymethylcellulose mixer be uniformly dissolved.Pour in ball mill by the sodium carboxymethylcellulose after dissolving, add the super-P accounting for mass fraction of solids 1%, ball milling disperses 1 hour.
Add the lithium titanate accounting for mass fraction of solids 82.5%, ball milling disperses 2 hours.
Add the dispersant ethylene glycol accounting for mass fraction of solids 5%, will the nanometer glass putty of mass fraction of solids 5% be accounted for and account for mass fraction 2% carbon fiber and add in mixing material and continue dispersion 1 hour after ball milling disperses 10 minutes.
Add the butadiene-styrene rubber accounting for mass fraction of solids 3%, ball milling disperses 1 hour, regulates slurry viscosity to zone of reasonableness, discharging.
Comparative example 1
Take deionized water as solvent, by account for mass fraction of solids be 1.5% thickener sodium carboxymethylcellulose mixer be uniformly dissolved,
Pour in ball mill by the sodium carboxymethylcellulose after dissolving, add the super-P accounting for mass fraction of solids 3%, ball milling disperses 1 hour.
Add the lithium titanate accounting for mass fraction of solids 82.5%, ball milling disperses 2 hours.
Add the dispersant ethylene glycol accounting for mass fraction of solids 5%, after ball milling disperses 10 minutes, the nanometer glass putty accounting for mass fraction of solids 5% is added in mixing material and continue dispersion 1 hour.
Add the butadiene-styrene rubber accounting for mass fraction of solids 3%, ball milling disperses 1 hour, regulates slurry viscosity to zone of reasonableness, discharging.
Comparative example 2
Take deionized water as solvent, by account for mass fraction of solids be 1.5% thickener sodium carboxymethylcellulose mixer be uniformly dissolved,
Pour in ball mill by the sodium carboxymethylcellulose after dissolving, add the super-P accounting for mass fraction of solids 1%, ball milling disperses 1 hour.
Add the lithium titanate accounting for mass fraction of solids 92.5%, ball milling disperses 2 hours.
Add the dispersant ethylene glycol accounting for mass fraction of solids 5%, mass fraction 2% carbon fiber will be accounted for after ball milling disperses 10 minutes and add in mixing material and continue dispersion 1 hour.
Add the butadiene-styrene rubber accounting for mass fraction of solids 3%, ball milling disperses 1 hour, regulates slurry viscosity to zone of reasonableness, discharging.
Comparative example 3
Take deionized water as solvent, by account for mass fraction of solids be 1.5% thickener sodium carboxymethylcellulose mixer be uniformly dissolved,
Pour in ball mill by the sodium carboxymethylcellulose after dissolving, add the super-P accounting for mass fraction of solids 3%, ball milling disperses 1 hour.
Add the lithium titanate accounting for mass fraction of solids 92.5%, ball milling disperses 2 hours.
Add the butadiene-styrene rubber accounting for mass fraction of solids 3%, ball milling disperses 1 hour, regulates slurry viscosity to zone of reasonableness, discharging.
The slurry prepared by comparative example and embodiment method makes anode plate for lithium ionic cell, and assembles battery, and cycle-index when its capacity, first efficiency and capability retention 80% lists in table 1.
Table 1
Can be found by comparative example 1 and comparative example 3 contrast, in negative pole, add nanometer glass putty effectively can improve battery capacity, but cycle performance declines comparatively remarkable, this may be change greatly because nanometer tin powder in battery charge and discharge process is long-pending, cause that negative material is loosely organized to come off, affect cycle performance of battery; Can be found by comparative example 2 and comparative example 3 contrast, when only adding carbon fiber in negative pole, can cycle performance of battery be improved, but battery capacity promotes little; Comparative example 1 and comparative example 1, comparative example 3 can find, add nanometer glass putty and carbon fiber not only can significantly improve battery capacity in battery cathode simultaneously, and its cycle performance is also highly improved.Reason is the filamentary structure feature that carbon fiber has, and each components such as itself and lithium titanate, nanometer glass putty, conductive agent are wound around mutually, plays and reinforces negative material, increases the effect of conductivity, thus improves battery capacity, improves the cycle life of battery.
Claims (7)
1. lithium titanate cathode of lithium ion battery slurry and preparation method thereof, comprise lithium titanate, conductive agent, binding agent, thickener, solvent and dispersant, it is characterized in that, also comprise nanometer glass putty and carbon fiber, conductive agent accounts for the 0%-3% of total solid weight, dispersant addition accounts for the 2%-10% of total solid mass fraction, nanometer glass putty accounts for the 2%-20% of total solid, carbon fiber accounts for the 20-80% of nanometer tin grain weight amount, described nanometer glass putty median particle diameter D50 scope is between 10-100nm, in described carbon fiber, straight particle diameter footpath D50 is between 10-200nm, its preparation process is as follows:
(1) thickener is added solvent mixer to be uniformly dissolved, pour in ball mill by the thickener after dissolving, add conductive agent, ball milling disperses 1 hour;
(2) add lithium titanate, ball milling disperses 2 hours;
(3) add dispersant, after ball milling disperses 10 minutes, nanometer glass putty and carbon fiber are added in mixing material and continue dispersion 1 hour;
(4) add binding agent, ball milling disperses 1 hour, regulates slurry viscosity to 2000-3000mPas, discharging.
2. a kind of lithium titanate cathode of lithium ion battery slurry according to claim 1 and preparation method thereof, is characterized in that, described carbon fiber is hollow or solid construction.
3. a kind of lithium titanate cathode of lithium ion battery slurry according to claim 2 and preparation method thereof, is characterized in that, the hollow structure of described carbon fiber is single layer hollow or multilayer hollow.
4. a kind of lithium titanate cathode of lithium ion battery slurry according to claim 1 and preparation method thereof, is characterized in that, described nanometer tin powder footpath is between 30-100nm.
5. a kind of lithium titanate cathode of lithium ion battery slurry according to claim 1 and preparation method thereof, is characterized in that, described conductive agent is the one in Super-P, graphite agent, Ketjen black.
6. a kind of lithium titanate cathode of lithium ion battery slurry according to claim 1 and preparation method thereof, is characterized in that, described solvent is deionized water, and binding agent is butadiene-styrene rubber, and thickener is sodium carboxymethylcellulose.
7. a kind of lithium titanate cathode of lithium ion battery slurry according to claim 1 and preparation method thereof, is characterized in that, described dispersant is ethylene glycol or glycerol.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510337679.8A CN104993119A (en) | 2015-06-18 | 2015-06-18 | Lithium ion battery lithium titanate negative electrode sizing agent and preparation method thereof |
| PCT/CN2016/083958 WO2016202167A1 (en) | 2015-06-18 | 2016-05-30 | Lithium titanate negative-electrode slurry for lithium-ion batteries and preparation method therefor |
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| CN201510337679.8A CN104993119A (en) | 2015-06-18 | 2015-06-18 | Lithium ion battery lithium titanate negative electrode sizing agent and preparation method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105470520A (en) * | 2015-12-01 | 2016-04-06 | 东莞市创明电池技术有限公司 | A kind of preparation method of lithium ion battery slurry |
| CN105489860A (en) * | 2015-12-15 | 2016-04-13 | 昆明仁旺科技有限公司 | Anode material for lithium-ion battery and preparation method of anode material |
| WO2016202167A1 (en) * | 2015-06-18 | 2016-12-22 | 田东 | Lithium titanate negative-electrode slurry for lithium-ion batteries and preparation method therefor |
| CN106972150A (en) * | 2017-04-17 | 2017-07-21 | 上海德朗能动力电池有限公司 | A kind of lithium titanate base lithium ion GND, lithium ion battery and its chemical synthesizing method |
| CN107681119A (en) * | 2016-08-02 | 2018-02-09 | 万向二三股份公司 | A kind of scattered method for preparing lithium battery slurry of no paddle |
| CN110534707A (en) * | 2019-08-19 | 2019-12-03 | 江苏特丰新材料科技有限公司 | A kind of preparation method of lithium titanate slurry |
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| CN109638228B (en) * | 2018-11-27 | 2021-02-05 | 扬州大学 | Preparation method of iron-nickel battery negative electrode material |
| CN111293280A (en) * | 2018-12-10 | 2020-06-16 | 北方奥钛纳米技术有限公司 | Negative plate and preparation method thereof, lithium ion battery and manufacturing method thereof |
| CN110459770A (en) * | 2019-07-31 | 2019-11-15 | 桑顿新能源科技(长沙)有限公司 | A kind of lithium titanate anode material, preparation method, cathode pole piece and lithium ion battery |
| CN116013697B (en) * | 2022-12-21 | 2024-11-01 | 广东风华高新科技股份有限公司 | Lithium ion capacitor and preparation method thereof |
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| US20110136009A1 (en) * | 2010-02-05 | 2011-06-09 | International Battery, Inc. | Rechargeable battery using an aqueous binder |
| CN104066776A (en) * | 2012-01-23 | 2014-09-24 | 巴斯夫欧洲公司 | Composite materials, their production and their use in separators for chemical batteries |
| CN104681785A (en) * | 2015-02-12 | 2015-06-03 | 山东精工电子科技有限公司 | Lithium ion battery anode coating material and preparation method thereof |
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| WO2016202167A1 (en) * | 2015-06-18 | 2016-12-22 | 田东 | Lithium titanate negative-electrode slurry for lithium-ion batteries and preparation method therefor |
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| CN105470520B (en) * | 2015-12-01 | 2018-02-02 | 东莞市创明电池技术有限公司 | Preparation method of lithium ion battery slurry |
| CN105489860A (en) * | 2015-12-15 | 2016-04-13 | 昆明仁旺科技有限公司 | Anode material for lithium-ion battery and preparation method of anode material |
| CN107681119A (en) * | 2016-08-02 | 2018-02-09 | 万向二三股份公司 | A kind of scattered method for preparing lithium battery slurry of no paddle |
| CN106972150A (en) * | 2017-04-17 | 2017-07-21 | 上海德朗能动力电池有限公司 | A kind of lithium titanate base lithium ion GND, lithium ion battery and its chemical synthesizing method |
| CN110534707A (en) * | 2019-08-19 | 2019-12-03 | 江苏特丰新材料科技有限公司 | A kind of preparation method of lithium titanate slurry |
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| WO2016202167A1 (en) | 2016-12-22 |
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